Abstract: Provided is a muffler valve 1 which is attached to a separator partitioning the inside of a muffler and opens and closes an exhaust passage according to the pressure of an exhaust gas of an engine. A valve body is swingably supported by a support shaft with respect to a valve seat. The valve body is urged in a closing direction by a spring member externally inserted to the support shaft. A valve seat substrate of the valve seat arranged along the separator is formed in a substantially flat-plate ring shape having an opening in the center. A valve body substrate of the valve body is formed in a flat dish shape having a flat rim. The muffler valve provides excellent handleability during attachment and can reduce the manufacturing cost of the muffler, improve manufacturing efficiency, and maintain high durability of the muffler.

Abstract: Repeating device connected to a local area network (LAN) which connects a plurality of telephones and relays communication between first and second telephones. The repeating devices include a unit for requesting during communication a response from another receiver-side telephone indicating its availability to receive a call, and a unit for notifying the address of the receiver-side telephone that responded to the caller-side telephone.

Abstract: A repeating device 14 for relaying the call to a plurality of receiver telephones 12a–12c that are connected to a local area network, comprising a function for requesting a reply to the plurality of receiver telephones 12a–12c asking their availability to receive a call, a function for selecting the destination of the call out of the receiver telephones 12a–12c that responded, and a function for notifying the address of the selected receiver telephone 12a to the caller telephone 22a. Further, the present repeating device comprises a function for receiving the transfer request from a user.

Abstract: A telephone 12a connected to a local area network 10, comprising a means for requesting during communication a response from another receiver-side telephone 12b indicating its availability to receive a call, and a means for notifying the address of the receiver-side telephone 12b that responded to the caller-side telephone 22a.

Abstract: A telephone 12a connected to a local area network 10, comprising a means for requesting during communication a response from another receiver-side telephone 12b indicating its availability to receive a call, and a means for notifying the address of the receiver-side telephone 12b that responded to the caller-side telephone 22a.

Abstract: A repeating device 14 for relaying the call to a plurality of receiver telephones 12a-12c that are connected to a local area network, comprising a function for requesting a reply to the plurality of receiver telephones 12a-12c asking their availability to receive a call, a function for selecting the destination of the call out of the receiver telephones 12a-12c that responded, and a function for notifying the address of the selected receiver telephone 12a to the caller telephone 22a. Further, the present repeating device comprises a function for receiving the transfer request from a user.

Abstract: A telephone 12a connected to a local area network 10, comprising a means for requesting during communication a response from another receiver-side telephone 12b indicating its availability to receive a call, and a means for notifying the address of the receiver-side telephone 12b that responded to the caller-side telephone 22a.